Chuck



Nov. 6 1923.

A. E'. CHURCH CHUCK Filed Nov, 1e 1922 Patented Nov. 6, 5'

r Q Appui-ization mea November 16.192'af1fse1-ia1 Ne. sorgere',

Vl'lloftZZ whomrz't-mayconcern). i' f `BeV it knownv that -I,.1lnnmvE.(ilexikon,V ancitizen of the -Unitedf States,r residing at N ew Britain, in the .county of Hartford andy` y 6 State Vof'Connecticut,haveginvented ricer-Vk tain'y new andfguseful Improvements LinM Chucks; and AvI .do declarethe -ollowing to:

bea full, clealyandexact description ot' the o invention, such1as wlleenable othersskilled 10 in 'thev art ;to.=which, it;` apperta'ins," to make j and use the same.

the scroll type. xIt islcommon'inthe art,-

toniesh` a plurality ,oflpinionsiwith gear 1'5 lteeth on the periphery of thescroll, and to provide an annulus Vor'geark rlng surround-` ingthe seriesof pinions andrmesh'ing therewith Yfor rapidly rotating said Ypinions tof adjust the scroll,'but by theiprovision of this speed increasing means, power-'is ofcourse sacrificed and consequently the chuck jawsvdo not grip the work'as 'tightly as is often desirable. `VIn another AforinV of chuck, well known to the art, a series ofpinions meshwiththe gear teethon the periphery of thescroll and are accessible Vfor turn- Y.

ing to operate said scroll.V This formv of chuck possesses ample *power `for tightly Vgripping the Work in thejchuck jaws, but lacksthe speed ofthe first mentioned type, having, the annulus -for rapidly rotating the pinions.;

vide a new form of chuck which vmay be considered anV improvementrofthetype rst mentioned, in that'it employs the scroll, pinions, and 'peripheral' ring vfor obtaining speedk adjustment of the jaw-s, andalso has the pinions'mountefd'so that theyy arek ac- 40 cessible for turning, toipermitjthe scroll andv jaws to beforcibly operated,totightly grip" thework` Thus, the advantagesof 'bothYV types of chucks,-abovereferred to, are-come,

Y bined in a-single structure. Y Y Y i :With the'oregoing in view', the invention resideslin the novel subject matter "herein-A after described and Y being supplementedby theaccompanying drawing: fr. 'in .Y f

YFigure 1 is lafverticallongitudinal;sec-lj tional I view of' the 'chuckY constructed in accordance-with my invention; Y 1 n "2 isY aV front elevation, Ypartly broken away and in section;VY Y' A, Y;

In they drawings above briefly described,

Itis the object omy invention to lpro# formed 'in'` the real' or back Y retained in place lby'suitable r great pressureQygf.-

till@Jnumeralill designates aA circular, ibaclck i. plate whichiis shownA as provided Vwitlrvinfl ternalH screw threads 2 for engagementwithl ing` understood howeyer,y VYthat if ,-desi'l'ed,4

other .provision could be ,',made torlmounting and:driving,thisgplateglif: circulargfront`rl v l. A l plate 3g is spacedfrontiy the-platefl andisj v providedfwith arearwardly ,extending hub 4; whichv is,threadedinto the plate on Well 'known form; :each .iguifleiwaybeing preferably formed'withv two parallel ribs A7 for reception inpgrooves 8 in kopposite sides of the jaws, permitting the use of the unio 65:?. @otherwise suitably `,connected theretofsad j je. plate 23, :being provided with suitable rada'l Y,

ver-sal jaw which'V `has been shown, a. rie# 'versal 'and independent jaw.7

Iversible top jaw, or #Combnation um', f The front plate'is provided with a'lange f i i! l9Aconcentricwith'theaxis of the chuck,saidI gudefmys 5' fOr-jaws@ ofv any-,desee 01rangeabutting andV lbeing@received-f.in a i;

groove rl0 in the front face 'of the back plate'l into the l therplate Y I have'shown lscrews'. `llV threadedV through .i flange 9 forV rigidly f' tying the Vfront and back plates together in 'v Properly spaced relation.; g :.Si A scroll l2'sur1oundsfthe hub 1;" between thegfrontand backy plates E-aiidvll'randiis'V provided atitsouter edge with gear teeth l3- inrunning contact with the inner'fside of the f 'flange' '9. At^circumferentially` spaced points,t his flange `is recessed as indicated at- Y A 14 toreceive pinions 15 having rtheir'axes parallel with the aXisof-.the chuck. In thef'; construction '-shown, the pinonsare insert-': able into the recesseslt through openings v16 ini the front Vplate 3, the tree en dofthei Platerlfbein ing 17 thread.;

v95. ed in' saidopenings 16.*" Each pinioni'liis Y* v provided;V withgra rearwardly 'extendin Y n Vtrunnion18having squared.' ends l9jlocate' in the fopening l-and saidpinionis alsof providedwithfa forwardly extending trun-v ,nionl20 received rotatably in an'. opening 21 l claimed, the n ldescription Vtunnion.20v being squaredl asindicated .at v22j .andlocated ,with'in'a counter-sink'23 insai'd. i VVplate' 3.: n Itfwillth'lus be seenthata suitable' Yi key may-be engaged with either fof the-`tI1`1 n-`V 'nions Vof'fany pinion,lfors'thepurpose of*VIV Y v rotating the ,sarnefcafusin'g fforcible turninggf *ofthejscroll"'l2ftogapply-Ithejaws v-vwith' An operating ring 24 surrounds the flange 9 between the outer portions of the plates l and 8 and is provided at its inner edge with gear teeth 25 meshing with the pinions l5.

t least the outer edge, but preferably the greater part of the ring 24:, is exposed at the periphery of the chuck so that it may be hand operated to rapidly rotate the pinions l5 and scroll l2, for the purpose of quickly engaging the jaws with the work or moving them away from the latter. I prei'er` to pro-k vide the ring 2% with radial sockets 26Vto receive the end of a suitable tool which may be used for rotating the ring 24. It will be seen however that this ring may also be gripped by hand and turned, for which purppse it is preferably knurled as indicated at 2 By employing the construction shown Y'or a substantial equivalent'thereof, a chuck is provided which will be highly advantageous, it being possible to rapidly operate the chuck by means of the ring 24 and to more forcibly contract or expand the jaws by applying a iff/3,4%

A chuck comprising a jaw-carrying head, i

a jaw-operating scroll vin said headY having gear teeth, a hand-rotated annulus carried by said head, said annulus'b-eing concentric with said scroll and also having gear teeth,4 and a single set of pinions mounted inthe head and exposed for direct operation, said y pinions meshing with the gear teeth 0In the scroll to forcibly turn the latter when any of said pinions 'is directly operated and also meshing with the teethy of said annulus for Y rapidly rotating the scroll when said annulus f y is turned. ,Y In testimony whereof-'I a'ixed my signature.

'Y have hereunto ALBERT E, CHURCH. 

